Susan Recently had a discussion about a great geo "trick" for Accumulo. As you know Accumulo maintains a sorted set of rows based on RowID, ColFam, ColQual. If you had data with LAT/LON values and you interlace the digits (fake coods example: lat 203.5, lon 127.1 --> 210237.51), it turns out that sorting keeps close points together in the table space. It only works for points not tiles, but perhaps you may want some analytics on center points of tiles or perhaps you want to efficiently index points of interest for structures or other features.
Best, David Arsenault The MITRE Corporation Sent from my iPad On Jun 26, 2012, at 9:31, "Thistlethwaite, Susan - IS" <[email protected]> wrote: > ALCON: > > My team has been tasked with ingesting/retrieving geospatial tiles to/from > Accumulo. > > I know others are using Z-Order or Hilbert Curves for storing geospatial > points. Do you know of others who are working with tiles/polygons/shape > files? > > W/r > Susan Thistlethwaite > Software-Systems Engineer > ITT Exelis > 12975 Worldgate Dr. > Herndon, VA 20170 > 571-332-2662 cell > 703-668-6539 office > [email protected]<mailto:[email protected]> email > > ________________________________ > Email addresses of ITT Exelis employees have changed from itt.com to > exelisinc.com. Please update your favorites and contact information to > reflect these changes. > > This e-mail and any files transmitted with it may be proprietary and are > intended solely for the use of the individual or entity to whom they are > addressed. If you have received this e-mail in error please notify the > sender. Please note that any views or opinions presented in this e-mail are > solely those of the author and do not necessarily represent those of Exelis > Inc. The recipient should check this e-mail and any attachments for the > presence of viruses. Exelis Inc. accepts no liability for any damage caused > by any virus transmitted by this e-mail.
